Medical Grade Isolation Power Transformers (VPM Series)

Triad Magnetics’ VPM Series medical-grade isolation transformers are designed for critical applications where patient safety, low leakage, and EMI performance are essential. These toroidal power transformers incorporate electrostatic shielding and a magnetic flux band to minimize common-mode noise and stray magnetic fields in sensitive medical and industrial environments.

The VPM Series offers a wide range of standard configurations, enabling design engineers to quickly identify a suitable solution without requiring custom magnetics.

Key Features & Selection Range:

  • Power Range: 25 VA to 10 kVA
  • Universal Input: Dual primary windings (100 / 120 / 220 / 240 VAC) for global applications
  • Flexible Outputs: Series and parallel secondary configurations for step-up, step-down, and isolation
    • Low Voltage: 6 V to 50 V
    • Isolation: 120 V / 240 V
  • High Isolation: 4,000 Vrms primary-to-secondary isolation
  • Shielding: Electrostatic shield and flux band for reduced leakage current and EMI
  • Low Stray Field: Toroidal construction minimizes magnetic radiation for sensitive equipment
  • Mounting: Chassis mount with wire leads for robust installation
  • Safety Approvals: UL Recognized component, certified to IEC / UL / CSA 60601-1 medical standards, including 2 MOPP (Means of Patient Protection) isolation

Typical Applications:

  • Medical equipment and patient-connected devices
  • Diagnostic and imaging systems
  • Laboratory instrumentation
  • Isolation for critical power systems
  • Industrial equipment requiring low noise and high isolation

Triad’s toroidal construction enables compact size, high efficiency, and low audible noise compared to traditional EI transformers, making the VPM Series ideal for space-constrained and noise-sensitive designs.

Request Information
Unit of Measure
Items
Medical Grade Isolation Power Transformers

5.28 Inch (in) Length Medical Grade Isolation Power Transformer
Medical Grade Isolation Power Transformers

5.28 Inch (in) Length Medical Grade Isolation Power Transformer
Medical Grade Isolation Power Transformers

6.38 Inch (in) Length Medical Grade Isolation Power Transformer
Medical Grade Isolation Power Transformers

6.38 Inch (in) Length Medical Grade Isolation Power Transformer
Medical Grade Isolation Power Transformers

7.17 Inch (in) Length Medical Grade Isolation Power Transformer
Description N/A

These medical grade isolation boxes are built using a toroidal transformer construction that inherently helps reduce stray fields, increases efficiency and minimizes size compared to traditional EI transformers. Built with Class F (155º) insulation system. The enclosure is made of steel and powder coated white.
Click here to check stock >> N/A N/A N/A N/A N/A
Maximum Power N/A 250 V·A N/A 250 V·A N/A 500 V·A N/A 500 V·A N/A 1000 V·A
Input Voltage1 N/A 240 V N/A 120 V N/A 240 V N/A 120 V N/A 240 V
Output Voltage2 N/A 120 V
Connection Type N/A Cord, Plug & Socket
Safety N/A Medical
Length N/A 5.28 in134 mm N/A 5.28 in134 mm N/A 6.38 in162 mm N/A 6.38 in162 mm N/A 7.17 in182 mm
Width N/A 6.93 in176 mm N/A 6.93 in176 mm N/A 8.23 in209 mm N/A 8.23 in209 mm N/A 9.06 in230 mm
Height N/A 5.12 in130 mm N/A 5.12 in130 mm N/A 5.75 in146 mm N/A 5.75 in146 mm N/A 5.75 in146 mm
Weight N/A 4.0 kg N/A 4.0 kg N/A 5.5 kg N/A 5.5 kg N/A 21 kg
Warranty N/A 5 years
Enclosure Material N/A Steel
Enclosure Finish N/A Powder Coated
Enclosure Color N/A White
Mounting N/A

Rubber Feet for Horizontal Mounting.
Input Voltage Tolerance (Power Cord) N/A ±10 %
Frequency (Power Cord) N/A 50 Hz60 Hz
Note for Output Voltage N/A Alternating Current (AC) Output Voltage (Receptacle) at Maximum 2.08 A. N/A Alternating Current (AC) Output Voltage (Receptacle) at Maximum 2.08 A. N/A Alternating Current (AC) Output Voltage (Receptacle) at Maximum 4.35 A. N/A Alternating Current (AC) Output Voltage (Receptacle) at Maximum 4.35 A. N/A Alternating Current (AC) Output Voltage (Receptacle) at Maximum 8.33 A.
Typical Voltage Regulation from Full Load to No Load N/A 8 % N/A 8 % N/A 5 % N/A 5 % N/A 5 %
Alternating Current (AC) Input to Output Voltage (Hi-Pot) N/A 3000 V
Alternating Current (AC) Input and Output to Enclosure Voltage (Ground) (Hi-Pot) N/A 1500 V
Typical Efficiency at Full Load N/A 92 % N/A 92 % N/A 94 % N/A 94 % N/A 94 %
Operating Ambient Temperature N/A Not to Exceed 60 ºC
Leakage Current N/A Less Than 50 µA
Typical Leakage Current N/A 10 µA
Fusing N/A Replace only with 1.8 A, 250 VAC, Slow Blow, UL Listed Fuses. Recommended Cooper Bussman MDL1-8/10-R. N/A Replace only with 3.0 A, 250 VAC, Slow Blow, UL Listed Fuses. Recommended Littelfuse 0313003. N/A Replace only with 3.0 A, 250 VAC, Slow Blow, UL Listed Fuses. Recommended Littelfuse 0313003. N/A Replace only with 6.0 A, 250 VAC, Slow Blow, UL Listed Fuses. Recommended Cooper Bussman MDL-6-R. N/A Replace only with 6.0 A, 250 VAC, Slow Blow, UL Listed Fuses. Recommended Cooper Bussman MDL-6-R.
Input Connections N/A 11 ft. Medical Grade Power Cord with NEMA 6-15P Plug. N/A 11 ft. Medical Grade Power Cord with NEMA 5-15P Plug. N/A 11 ft. Medical Grade Power Cord with NEMA 6-15P Plug. N/A 11 ft. Medical Grade Power Cord with NEMA 5-15P Plug. N/A 11 ft. Medical Grade Power Cord with NEMA 6-15P Plug.
Output Connections N/A Duplex Receptacle. NEMA 5-15R. N/A Duplex Receptacle. NEMA 5-15R. N/A Duplex Receptacle. NEMA 5-15R. N/A Duplex Receptacle. NEMA 5-15P. N/A Duplex Receptacle. NEMA 5-15R.
Insulation Class N/A Class F (155º)
Industry Standards N/A CSA cULus Listed RoHS 2015/863/EU
Note N/A

Medical isolation transformer box is certified to UL 60601-1, 2nd edition medical standard and CSA-C22.2.No. 601.1M90, 2005
UL: (E352717), UL60601-1, 2nd edition and CAN/CSA-C22.2 No. 601.1M90, 2005

Not for use in life critical application.
  • 1 Alternating Current (AC) Input Volatge (Power Cord)
  • 2 Combined loads connected to receptacle (s) must not exceed maximum current rating.